For example, inept leaders like former Mayor Ray Nagin and the equally lost Kathleen Blanc have been replaced by more effective figures like Mayor Mitch Landrieu and Gov. Bobby Jindal.

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"Reports of lower effective tax rates appear to arrive at their figures by running together the profits earned by group companies in Ireland and in other jurisdictions, " Kenny said.

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He hopes the huge variations highlighted by the new figures will act as a spur for research into effective new treatments for cancers such as his.

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